Stockholders' Equity (Deficit) (Tables)

12 Months Ended

Dec. 31, 2019

Equity [Abstract]

Schedule of Reserved Shares of Common Stock for Future Issuance

The Company had reserved shares of common stock for future issuance as follows: 

	December 31,
	2019	2018
Outstanding stock options (Note 11)	1,789,303	1,671,666
Warrants to purchase common stock issued in January 2018 Offering	10,000,000	10,000,000
Outstanding stock appreciation rights (Note 11)	1,000,000	—
For possible future issuance under 2016 Stock Plan (Note 11)	388,463	699,376
	13,177,766	12,371,042